Damper-lock and indicator.



M.HAM. l DAMPER LOCK AND INDICATOR. APPLICATIUN F |LED MAR. l5, 19|]- '1Patented oet; 23,1911

MADILSN HAM, OF GLEN COVE, NEW YORK.

nAMrEnfLocK AND INDICATOR.

To 'all w/wm, t may concern:

" Be it known that I, MADISON HAM, a citizen of the United States,residing at Glen Cove, L. I., in the county of Nassau, State .of NewYork, have invented 4certain new and useful Improvements in Damper-Locksand Indicatotrs'; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in stove or furnace dampers andis directed more particularly to a safety damper lock .and indicator.

An object of the present invention resides 1n the provlsion of anappliance of the above nature embodying means of novel construction andarrangement by which the damper may be locked in various positions ofadjustment and be thus securely held against accidental displacement aswell as eectively protected from unauthorized tampering.

The invention further resides in. such an arrangement of the damper,locking mecha.-

lnism as that certain of the elementsv thereof constitute an accurateand readily discernible indicator by which the position of the dampermay be determined at a glance.

With the above and other objects of similar nature inview, the inventionconsists in the construction, combination and arrangel ment of parts setforth in and falling within the scope of the appended claim.

' i In the drawing:

Figure l is a front elevation of a section of a stove pipe with theinvention' associated therewith and in locked position,

.'Fig. 2vis aside elevationthereof, Y

Fig. 3 is 4view similar to Fig. .1 with the parts in position to permitof adjustlng the damper,

Fig. 4 is a vertical section taken on the line 4 4: of Fig. 1, l

Fig. 5 is a vertical section taken on the line 5--5 of Fig. 2, and, l

Fig. 6 isl a horizontal section taken on the line 6-6 of Fig. 1. l

Referring now more particularly to the accompanylng drawing, there isconventionally shown section of stove pipe A, the invention beingindicated general y at B as associated with the pipe.

. Journaled transversely of the pipe yA 1s a rod 5, one end of which isextended Specication of Letters Patent.

Patented' operas, '11917.

Application led March 15, 1917. Serial No. 155,106.. i

' through the pipe as indicated at 5v-.

ed upon the rod 5 is a damper platea-7 which may be any preferred type-andis adapted for adjustment in the usual manner within the pipe A.

Xrranged exteriorly of the pipe andf'secured thereto by any desiredmeans, are a,` pair of. vertically `spaced bracketsy 8 .by

means of which is xedly supported a plate 9. An opening is provided inthe plate 9,

and has .journaled therein the extended end 5 of the rod 5, said endbeing continued beyond the outer face of the plate and carrying a-crankarm 6 by which the damper plate 7 is adjusted. The arm 6 is provided atits inner end 'with' an enlarged head having a transverse bore receivingthe extendedend ofthe rod, set screws 16 being engaged through said-headto secure the arm in place. A handle 17 provided on the arm facilitiesits manipulation, the

arm swinging across the face of the plate 9 when moved to control thedamper.

For holding the crank arm and consequently the dainper plate in itsvarious positions of adjustment, there is'hinged to the 1l the face ofwhich is normally disposed in contact-with the plate 9, beingvprovidedwith a plurality of notches 12 extending radially with respect tothe rod5 and adapted to receive interchangeably, the free end ofthe crank arm6. A staple 13 is carried by the plate 9 andk arranged to pass looselyplate 9 as indicated at 10, a segmentalplate I through a slot 14: formedin the segmental Vplate 11 so that a padlock 15 may be engaged therewithto lock theplates together as clearly illustrated.

In order to manipulate the crank arm 6 for adjusting the ldamper plate 7,it is first necessary to unlock and remove the padlock 15, thesegmental plate .being then swung downw-ardly'andoutwardly to disengageit from the arm, after which the latter may be readily turned. When the,desired adjustment is eected, the `segmental plate is again swungupwardly and locked to positively maintain the adjustment of the damper,accidentalvdisplace-v ment as well as unauthorized tampering with thedamper being effectively prevented as will be evident.

It will 4further be noted that the seg mental plate is provided on whatis nominelly its outer facewithaplurality of suitable designations tocorrespond with' the notches 12 so that the position of the damper maybe readily noted, the crank arm 6 serving as an indicator or pointer forthis purpose. l

If desired the Words Gas, Danger, DamperClosed may be delineated uponthe face ofthe plate 9 as illustrated in Fig. l to indicate when thecrank arm 6 isA engaged in either of the notches ldesignated 12, thatthe damper is closed and it is in conse. quence dangerous to attempt tokindle a re because of the excessive coal gas generated.

The combination with a stove pipe, of arodl journaled transverselythereof, a "mank nasales arm fixed to the rod outwardly of the pipe, adamper plate carried by the rod for adjustment 'Within the pipe, a ixedplate, a plate hinged to the fixed plate and provided With a pluralityof radially extending notches arranged to interchangeablyrecelve thecrank arm and adapted with the fixed plate to hold said arm in variouspositions -of adjustment, and means for locking said plates in holdingposition.`

ln testimony whereof, I -ahx my signature, in the presence of twoWitnesses.

, MADISON HAM. Witnesses:

ANGELINE MITCHELL,

WALTER H. MORRIS.

